package day1704;

public class cahunkou {
    public static void main(String[] args) {
        piao a = new piao();
        piao b = new piao();
        piao c = new piao();
        piao d = new piao();

        a.setName("窗口1");
        b.setName("窗口2");


        c.setName("窗口3");
        d.setName("窗口4");

        a.start();
        b.start();
        c.start();
        d.start();
    }
}
